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        <h3>jsonp&nbsp; <span class="subtitle">3.3.0</span></h3>
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                        <div class="highlight"><pre><span class="kd">var</span> <span class="nx">JSONPRequest</span> <span class="o">=</span> <span class="nx">Y</span><span class="p">.</span><span class="nx">JSONPRequest</span><span class="p">,</span>
    <span class="nx">getByPath</span>    <span class="o">=</span> <span class="nx">Y</span><span class="p">.</span><span class="nb">Object</span><span class="p">.</span><span class="nx">getValue</span><span class="p">,</span>
    <span class="nx">noop</span>         <span class="o">=</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{};</span>

<span class="cm">/**</span>
<span class="cm"> * Adds support for parsing complex callback identifiers from the jsonp url.</span>
<span class="cm"> * This includes callback=foo[1]bar.baz[&quot;goo&quot;] as well as referencing methods</span>
<span class="cm"> * in the YUI instance.</span>
<span class="cm"> *</span>
<span class="cm"> * @module jsonp</span>
<span class="cm"> * @submodule jsonp-url</span>
<span class="cm"> * @for JSONPRequest</span>
<span class="cm"> */</span>

<span class="nx">Y</span><span class="p">.</span><span class="nx">mix</span><span class="p">(</span><span class="nx">JSONPRequest</span><span class="p">.</span><span class="nx">prototype</span><span class="p">,</span> <span class="p">{</span>
    <span class="cm">/**</span>
<span class="cm">     * RegExp used by the default URL formatter to insert the generated callback</span>
<span class="cm">     * name into the JSONP url.  Looks for a query param callback=.  If a value</span>
<span class="cm">     * is assigned, it will be clobbered.</span>
<span class="cm">     *</span>
<span class="cm">     * @member _pattern</span>
<span class="cm">     * @type RegExp</span>
<span class="cm">     * @default /\bcallback=.*?(?=&amp;|$)/i</span>
<span class="cm">     * @protected</span>
<span class="cm">     */</span>
    <span class="nx">_pattern</span><span class="o">:</span> <span class="sr">/\bcallback=(.*?)(?=&amp;|$)/i</span><span class="p">,</span>

    <span class="cm">/**</span>
<span class="cm">     * Template used by the default URL formatter to add the callback function</span>
<span class="cm">     * name to the url.</span>
<span class="cm">     *</span>
<span class="cm">     * @member _template</span>
<span class="cm">     * @type String</span>
<span class="cm">     * @default &quot;callback={callback}&quot;</span>
<span class="cm">     * @protected</span>
<span class="cm">     */</span>
    <span class="nx">_template</span><span class="o">:</span> <span class="s2">&quot;callback={callback}&quot;</span><span class="p">,</span>

    <span class="cm">/**</span>
<span class="cm">     * &lt;p&gt;Parses the url for a callback named explicitly in the string.</span>
<span class="cm">     * Override this if the target JSONP service uses a different query</span>
<span class="cm">     * parameter or url format.&lt;/p&gt;</span>
<span class="cm">     *</span>
<span class="cm">     * &lt;p&gt;If the callback is declared inline, the corresponding function will</span>
<span class="cm">     * be returned.  Otherwise null.&lt;/p&gt;</span>
<span class="cm">     *</span>
<span class="cm">     * @method _defaultCallback</span>
<span class="cm">     * @param url {String} the url to search in</span>
<span class="cm">     * @return {Function} the callback function if found, or null</span>
<span class="cm">     * @protected</span>
<span class="cm">     */</span>
    <span class="nx">_defaultCallback</span><span class="o">:</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">url</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">match</span> <span class="o">=</span> <span class="nx">url</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_pattern</span><span class="p">),</span>
            <span class="nx">keys</span>  <span class="o">=</span> <span class="p">[],</span>
            <span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span>
            <span class="nx">locator</span><span class="p">,</span> <span class="nx">path</span><span class="p">,</span> <span class="nx">callback</span><span class="p">;</span>

        <span class="k">if</span> <span class="p">(</span><span class="nx">match</span><span class="p">)</span> <span class="p">{</span>
            <span class="c1">// Strip the [&quot;string keys&quot;] and [1] array indexes</span>
            <span class="nx">locator</span> <span class="o">=</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
                <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\[([&#39;&quot;])(.*?)\1\]/g</span><span class="p">,</span>
                    <span class="kd">function</span> <span class="p">(</span><span class="nx">x</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$2</span><span class="p">)</span> <span class="p">{</span>
                        <span class="nx">keys</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">=</span> <span class="nx">$2</span><span class="p">;</span>
                        <span class="k">return</span> <span class="s1">&#39;.@&#39;</span> <span class="o">+</span> <span class="p">(</span><span class="nx">i</span><span class="o">++</span><span class="p">);</span>
                    <span class="p">})</span>
                <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\[(\d+)\]/g</span><span class="p">,</span>
                    <span class="kd">function</span> <span class="p">(</span><span class="nx">x</span><span class="p">,</span> <span class="nx">$1</span><span class="p">)</span> <span class="p">{</span>
                        <span class="nx">keys</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">=</span> <span class="nb">parseInt</span><span class="p">(</span><span class="nx">$1</span><span class="p">,</span> <span class="mi">10</span><span class="p">)</span> <span class="o">|</span> <span class="mi">0</span><span class="p">;</span>
                        <span class="k">return</span> <span class="s1">&#39;.@&#39;</span> <span class="o">+</span> <span class="p">(</span><span class="nx">i</span><span class="o">++</span><span class="p">);</span>
                    <span class="p">})</span>
                <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/^\./</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">);</span> <span class="c1">// remove leading dot</span>

            <span class="c1">// Validate against problematic characters.</span>
            <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="sr">/[^\w\.\$@]/</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">locator</span><span class="p">))</span> <span class="p">{</span>
                <span class="nx">path</span> <span class="o">=</span> <span class="nx">locator</span><span class="p">.</span><span class="nx">split</span><span class="p">(</span><span class="s1">&#39;.&#39;</span><span class="p">);</span>
                <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span> <span class="nx">i</span> <span class="o">&gt;=</span> <span class="mi">0</span><span class="p">;</span> <span class="o">--</span><span class="nx">i</span><span class="p">)</span> <span class="p">{</span>
                    <span class="k">if</span> <span class="p">(</span><span class="nx">path</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">charAt</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> <span class="o">===</span> <span class="s1">&#39;@&#39;</span><span class="p">)</span> <span class="p">{</span>
                        <span class="nx">path</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">=</span> <span class="nx">keys</span><span class="p">[</span><span class="nb">parseInt</span><span class="p">(</span><span class="nx">path</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">substr</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="mi">10</span><span class="p">)];</span>
                    <span class="p">}</span>
                <span class="p">}</span>

                <span class="c1">// First look for a global function, then the Y, then try the Y</span>
                <span class="c1">// again from the second token (to support &quot;callback=Y.handler&quot;)</span>
                <span class="nx">callback</span> <span class="o">=</span> <span class="nx">getByPath</span><span class="p">(</span><span class="nx">Y</span><span class="p">.</span><span class="nx">config</span><span class="p">.</span><span class="nx">win</span><span class="p">,</span> <span class="nx">path</span><span class="p">)</span> <span class="o">||</span>
                           <span class="nx">getByPath</span><span class="p">(</span><span class="nx">Y</span><span class="p">,</span> <span class="nx">path</span><span class="p">)</span> <span class="o">||</span>
                           <span class="nx">getByPath</span><span class="p">(</span><span class="nx">Y</span><span class="p">,</span> <span class="nx">path</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="mi">1</span><span class="p">));</span>
            <span class="p">}</span>
        <span class="p">}</span>

        <span class="k">return</span> <span class="nx">callback</span> <span class="o">||</span> <span class="nx">noop</span><span class="p">;</span>
    <span class="p">},</span>

    <span class="cm">/**</span>
<span class="cm">     * URL formatter that looks for callback= in the url and appends it</span>
<span class="cm">     * if not present.  The supplied proxy name will be assigned to the query</span>
<span class="cm">     * param.  Override this method by passing a function as the</span>
<span class="cm">     * &amp;quot;format&amp;quot; property in the config object to the constructor.</span>
<span class="cm">     *</span>
<span class="cm">     * @method _format</span>
<span class="cm">     * @param url { String } the original url</span>
<span class="cm">     * @param proxy {String} the function name that will be used as a proxy to</span>
<span class="cm">     *      the configured callback methods.</span>
<span class="cm">     * @return {String} fully qualified JSONP url</span>
<span class="cm">     * @protected</span>
<span class="cm">     */</span>
    <span class="nx">_format</span><span class="o">:</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">url</span><span class="p">,</span> <span class="nx">proxy</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">callback</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">_template</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\{callback\}/</span><span class="p">,</span> <span class="nx">proxy</span><span class="p">),</span>
            <span class="nx">lastChar</span><span class="p">;</span>

        <span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_pattern</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">url</span><span class="p">))</span> <span class="p">{</span>
            <span class="k">return</span> <span class="nx">url</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_pattern</span><span class="p">,</span> <span class="nx">callback</span><span class="p">);</span>
        <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
            <span class="nx">lastChar</span> <span class="o">=</span> <span class="nx">url</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">);</span>
            <span class="k">if</span> <span class="p">(</span><span class="nx">lastChar</span> <span class="o">!==</span> <span class="s1">&#39;&amp;&#39;</span> <span class="o">&amp;&amp;</span> <span class="nx">lastChar</span> <span class="o">!==</span> <span class="s1">&#39;?&#39;</span><span class="p">)</span> <span class="p">{</span>
                <span class="nx">url</span> <span class="o">+=</span> <span class="p">(</span><span class="nx">url</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="s1">&#39;?&#39;</span><span class="p">)</span> <span class="o">&gt;</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="o">?</span> <span class="s1">&#39;&amp;&#39;</span> <span class="o">:</span> <span class="s1">&#39;?&#39;</span><span class="p">;</span>
            <span class="p">}</span>
            <span class="k">return</span> <span class="nx">url</span> <span class="o">+</span> <span class="nx">callback</span><span class="p">;</span>
        <span class="p">}</span>
    <span class="p">}</span>

<span class="p">},</span> <span class="kc">true</span><span class="p">);</span>
</pre></div>

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